.page-about{
  --about-rule: rgba(159,178,181,.45);
  --about-softink: rgba(243,239,228,.82);
  --about-dimink: rgba(243,239,228,.64);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  padding-bottom: 56px;
  -webkit-font-smoothing: antialiased;
}

.page-about .about-wrap{
  padding: 24px 16px 0;
}

.page-about img{
  display: block;
  max-width: 100%;
  height: auto;
}

/* 面包屑 */
.page-about .breadcrumbs{
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--lake);
  margin-bottom: 18px;
}
.page-about .breadcrumbs a{
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease);
}
.page-about .breadcrumbs a:hover{
  border-bottom-color: var(--lake);
}

/* 首屏 */
.page-about .about-hero{
  position: relative;
  overflow: hidden;
  padding: 34px 22px 32px;
  background:
    radial-gradient(120% 92% at 88% 6%, rgba(30,113,136,.58) 0%, rgba(14,38,48,0) 64%),
    linear-gradient(168deg, var(--qingdai) 0%, var(--qingdai-2) 70%, #123a49 100%);
  color: var(--paper);
  border-radius: 3px;
  box-shadow: var(--shadow-card);
}
.page-about .about-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(45,245,208,.07) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(90deg, rgba(45,245,208,.07) 0 1px, transparent 1px 46px);
  opacity: .7;
  pointer-events: none;
}
.page-about .about-hero > *{
  position: relative;
  z-index: 1;
}
.page-about .about-kicker{
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .22em;
  color: var(--cyan);
  text-transform: uppercase;
}
.page-about .about-h1{
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(30px, 7.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper);
  max-width: 22ch;
}
.page-about .about-lede{
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-softink);
}
.page-about .about-facts{
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
}
.page-about .about-facts li{
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-right: 16px;
  margin-right: 16px;
  border-right: 1px solid rgba(243,239,228,.2);
}
.page-about .about-facts li:last-child{
  border-right: 0;
  margin-right: 0;
  padding-right: 0;
}
.page-about .about-num{
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.2;
}
.page-about .about-facts em{
  font-style: normal;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--about-dimink);
}

/* 页内索引 */
.page-about .about-index{
  margin-top: 16px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--paper-lift);
  border: 1px solid var(--about-rule);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-index-label{
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--lake);
  padding-right: 12px;
  border-right: 1px solid var(--about-rule);
}
.page-about .about-index ol{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
}
.page-about .about-index a{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-size: 13px;
  color: var(--qingdai);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}
.page-about .about-index a .mono{
  font-size: 11px;
  color: var(--lake);
}
.page-about .about-index a:hover{
  background: var(--lake-soft);
  border-color: var(--lake);
}

/* 章节通用 */
.page-about .about-sec{
  padding: 44px 0 8px;
  scroll-margin-top: 24px;
}
.page-about .about-sec-head{
  display: flex;
  align-items: baseline;
  gap: 14px;
  border-top: 2px solid var(--lake);
  padding-top: 14px;
  margin-bottom: 20px;
}
.page-about .about-sec-num{
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lake);
}
.page-about .about-sec-head h2{
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(20px, 4.4vw, 31px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-about .about-body{
  margin: 0 0 26px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
}

/* 图 */
.page-about .about-figure{
  margin: 0 0 24px;
}
.page-about .about-figure .media-frame{
  overflow: hidden;
}
.page-about .about-figure img{
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .figure-cap{
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--fog);
  letter-spacing: .02em;
}

/* 四块业务 */
.page-about .about-pillars{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding-bottom: 4px;
}
.page-about .pillar{
  --base: 0px;
  --hover: 0px;
  position: relative;
  background: var(--paper-lift);
  border: 1px solid var(--about-rule);
  padding: 20px 18px 18px;
  box-shadow: var(--shadow-card);
  transform: translateY(calc(var(--base) + var(--hover)));
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.page-about .pillar:hover{
  --hover: -2px;
  border-color: var(--lake);
}
.page-about .pillar-tag{
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--lake);
}
.page-about .pillar h3{
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--qingdai);
}
.page-about .pillar p{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

/* 深色长卷 */
.page-about .about-sec--dark{
  background:
    radial-gradient(110% 70% at 92% 0%, rgba(30,113,136,.42) 0%, rgba(14,38,48,0) 62%),
    var(--qingdai);
  color: var(--paper);
  margin: 44px -16px 0;
  padding: 32px 16px 30px;
  border-top: 1px solid rgba(45,245,208,.3);
  border-bottom: 1px solid rgba(45,245,208,.3);
}
.page-about .about-sec--dark .about-sec-head{
  border-top-color: rgba(45,245,208,.55);
}
.page-about .about-sec--dark .about-sec-num{
  color: var(--cyan);
}
.page-about .about-sec--dark .about-sec-head h2{
  color: var(--paper);
}
.page-about .about-tl-intro{
  margin: 0 0 20px;
  font-size: 13.5px;
  color: var(--about-dimink);
  max-width: 52ch;
}

/* 时间轴 */
.page-about .tl-track{
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  border-left: 2px solid rgba(45,245,208,.4);
  padding-left: 22px;
  margin: 0 0 8px;
}
.page-about .tl-node{
  position: relative;
  padding: 0 0 26px;
  outline: none;
}
.page-about .tl-node::before{
  content: "";
  position: absolute;
  left: -27px;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--cyan);
  border-radius: 50%;
}
.page-about .tl-ver{
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}
.page-about .tl-title{
  margin: 5px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}
.page-about .tl-desc{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-softink);
}
.page-about .tl-more{
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-dimink);
  transition: max-height .22s var(--ease), opacity .22s var(--ease), margin-top .22s var(--ease);
}
.page-about .tl-node:hover .tl-more,
.page-about .tl-node:focus-within .tl-more{
  max-height: 220px;
  opacity: 1;
  margin-top: 8px;
}
.page-about .tl-node:hover::before,
.page-about .tl-node:focus-within::before{
  box-shadow: 0 0 0 4px rgba(45,245,208,.22);
}
.page-about .about-figure--dark{
  margin: 6px 0 0;
}
.page-about .about-sec--dark .figure-cap{
  color: rgba(159,178,181,.85);
}

/* 团队 */
.page-about .team-layout{
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}
.page-about .about-figure--team{
  margin: 0;
}
.page-about .team-cards{
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-about .team-card{
  position: relative;
  padding: 16px 16px 16px 18px;
  background: var(--paper-lift);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--lake);
  transition: border-left-color .2s var(--ease), background-color .2s var(--ease);
}
.page-about .team-card:hover{
  border-left-color: var(--gold);
  background: var(--lake-soft);
}
.page-about .team-idx{
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--fog);
}
.page-about .team-card h3{
  margin: 0 0 7px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--qingdai);
}
.page-about .team-card p{
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
}

/* 覆盖范围 */
.page-about .about-sec--soft{
  background: var(--lake-soft);
  margin: 44px -16px 0;
  padding: 32px 16px 30px;
  border-top: 1px solid rgba(30,113,136,.2);
  border-bottom: 1px solid rgba(30,113,136,.2);
}
.page-about .cov-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-about .cov-item{
  --cov: var(--lake);
  position: relative;
  padding: 18px 16px 15px;
  background: var(--paper-lift);
  border: 1px solid rgba(30,113,136,.22);
  overflow: hidden;
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}
.page-about .cov-item::before{
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--cov);
}
.page-about .cov-item:hover{
  background: var(--paper);
  transform: translateY(-2px);
}
.page-about .cov--league{ --cov: var(--lake); }
.page-about .cov--team{ --cov: var(--qingdai); }
.page-about .cov--fee{ --cov: var(--gold); }
.page-about .cov--region{ --cov: var(--fog); }
.page-about .cov--partner{ --cov: var(--qingdai-2); }
.page-about .cov-num{
  margin: 0;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--qingdai);
}
.page-about .cov-label{
  margin: 4px 0 6px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--lake);
}
.page-about .cov-desc{
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink);
}
.page-about .cov-note{
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed rgba(30,113,136,.4);
}
.page-about .cov-note h3{
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--qingdai);
}
.page-about .cov-note p{
  margin: 0 0 10px;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.8;
}

/* 合作与原则 */
.page-about .partner-cols{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .partner-col{
  padding: 20px 18px;
  background: var(--paper-lift);
  border: 1px solid var(--about-rule);
  transition: border-color .2s var(--ease);
}
.page-about .partner-col:hover{
  border-color: var(--lake);
}
.page-about .partner-col h3{
  margin: 0 0 9px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--qingdai);
}
.page-about .partner-col p{
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.78;
}
.page-about .partner-list{
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .partner-list li{
  position: relative;
  padding-left: 16px;
  margin-bottom: 9px;
  font-size: 14px;
  line-height: 1.72;
}
.page-about .partner-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--gold);
}
.page-about .partner-list li:last-child{
  margin-bottom: 0;
}
.page-about .about-inline-link{
  display: inline-block;
  font-size: 13.5px;
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(30,113,136,.4);
  padding-bottom: 1px;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.page-about .about-inline-link:hover{
  color: var(--qingdai);
  border-bottom-color: var(--qingdai);
}

/* 收尾入口 */
.page-about .about-cta{
  margin: 44px 0 0;
  padding: 28px 22px 30px;
  background: var(--qingdai);
  color: var(--paper);
  border-radius: 3px;
}
.page-about .about-cta h2{
  margin: 0 0 10px;
  font-size: clamp(19px, 4vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--paper);
}
.page-about .about-cta p{
  margin: 0 0 20px;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-softink);
}
.page-about .about-cta-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 焦点可见性 */
.page-about a:focus-visible,
.page-about .tl-node:focus-visible{
  outline: 2px solid var(--violet);
  outline-offset: 2px;
}

/* 断点 */
@media (min-width: 600px){
  .page-about .cov-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .team-cards{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px){
  .page-about .about-wrap{
    padding-inline: 20px;
  }
  .page-about .about-hero{
    padding: 46px 40px 42px;
  }
  .page-about .about-lede{
    font-size: 16.5px;
  }
  .page-about .about-pillars{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 22px;
    padding-bottom: 34px;
  }
  .page-about .pillar:nth-child(even){
    --base: 26px;
  }
  .page-about .partner-cols{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-sec--dark,
  .page-about .about-sec--soft{
    margin-inline: -20px;
    padding-inline: 20px;
  }
}

@media (min-width: 900px){
  .page-about .team-layout{
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 28px;
  }
  .page-about .tl-track{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 22px;
    border-left: 0;
    border-top: 2px solid rgba(45,245,208,.4);
    padding-left: 0;
    padding-top: 30px;
  }
  .page-about .tl-node{
    padding: 0 0 10px;
  }
  .page-about .tl-node::before{
    left: 0;
    top: -35px;
  }
  .page-about .about-figure--dark{
    margin-top: 26px;
  }
}

@media (min-width: 960px){
  .page-about .cov-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .pillar,
  .page-about .cov-item,
  .page-about .team-card,
  .page-about .partner-col,
  .page-about .tl-more,
  .page-about .about-index a,
  .page-about .about-inline-link,
  .page-about .breadcrumbs a{
    transition: none;
  }
  .page-about .pillar,
  .page-about .cov-item{
    transform: none;
  }
}